ผู้เขียน: Gail Marshall

Phillip Harris is Executive Director of the Association for Educational Communications & Technology. He is the former Director of the Center for Professional Development at Phi Delta Kappa International and was a member of the faculty of Indiana University for 22 years, serving in both the Psychology Department and the School of Education.For 27 years, Bruce M. Smith was a member of the editorial staff of the Phi Delta Kappan, the flagship publication of Phi Delta Kappa International, the association for professional educators. He retired as editor-in-chief in 2008. He holds degrees from M.I.T., the University of New Hampshire, and Indiana University.Joan Harris has taught first, second, and third grades for more than 25 years. In 1997, she was recognized by the National Association for the Education of Young Children as the outstanding teacher of the year.